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usb: dwc3: prevent setting PRTCAP to OTG from debugfs

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We don't support PRTCAP == OTG yet, so prevent user from
setting it via debugfs.

Fixes: 41ce1456e1 ("usb: dwc3: core: make dwc3_set_mode() work properly")
Cc: <stable@vger.kernel.org> # v4.12+
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Roger Quadros 2018-02-27 12:54:37 +02:00 committed by Felipe Balbi
parent 4cff75c7fe
commit daaecc6541
1 changed files with 3 additions and 0 deletions
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3
drivers/usb/dwc3/core.c
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@ -119,6 +119,9 @@ static void __dwc3_set_mode(struct work_struct *work)
if (dwc->dr_mode != USB_DR_MODE_OTG)
return;
if (dwc->desired_dr_role == DWC3_GCTL_PRTCAP_OTG)
return;
switch (dwc->current_dr_role) {
case DWC3_GCTL_PRTCAP_HOST:
dwc3_host_exit(dwc);